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Trans-Neptunian Object dynamics even better explained by a stellar flyby after 4.5 Gyr of evolution

Pfalzner, Susanne et al.
arXiv (All) · Papers
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astrophysics-of-galaxiesearth-and-planetary-astrophysicssolar-and-stellar-astrophysics
The Trans-Neptunian objects (TNOs) formed together with the planets from a flat disc of gas and dust but now orbit the Sun mostly on inclined, eccentric orbits. One explanation for the TNOs' orbits is a close flyby of another star. One with a mass of $M_p =$0.8 Msun at $q_p =$ 110 au and $i_p =$70°
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